I'm very commonly getting a phone display that looks like the following when operating the P4. It seems most common when on the ground and usually clears up when flying. However, it does sometimes occur when flying as well. The lines are not constant. They move around and change shape and color. They are mostly either green or magenta, though. I've never seen this when flying the P3. I updated the firmware and still have the same problem. It seems like signal interference or something. Has anybody ever seen this behavior before?